commit fee9492c173c8defd66017fd5c3bf4b7fee4a7a7
author Roland McGrath <mcgrathr@google.com> Fri Jun 15 15:38:33 2018 -0700
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> Fri Jun 15 22:53:09 2018 +0000
tree f25edef4da945689d86d23b3b3f4cf90c3a3b3d7
parent 3cb6123cedec596d510f34a9d5f58e371091b0fa

[ulib][musl] Fix restrict pointer aliasing violation in ualarm

Change-Id: Ia8ed03a6ebfa88b182b3dbd4a3533d41442660d3

third_party/ulib/musl/src/unistd/ualarm.c

diff --git a/third_party/ulib/musl/src/unistd/ualarm.c b/third_party/ulib/musl/src/unistd/ualarm.c
index b56e560..76ffa9c 100644
--- a/third_party/ulib/musl/src/unistd/ualarm.c
+++ b/third_party/ulib/musl/src/unistd/ualarm.c
@@ -3,7 +3,11 @@
 #include <unistd.h>
 
 unsigned ualarm(unsigned value, unsigned interval) {
-    struct itimerval it = {.it_interval.tv_usec = interval, .it_value.tv_usec = value};
-    setitimer(ITIMER_REAL, &it, &it);
-    return it.it_value.tv_sec * 1000000 + it.it_value.tv_usec;
+    struct itimerval it = {
+        .it_interval.tv_usec = interval,
+        .it_value.tv_usec = value,
+    };
+    struct itimerval old = {};
+    setitimer(ITIMER_REAL, &it, &old);
+    return old.it_value.tv_sec * 1000000 + old.it_value.tv_usec;
 }